Rare-earth oxide–Li0.3Ni0.9Cu0.07Sr0.03O2-δ composites for advanced fuel cells. (24th August 2017)

• Record Type: Journal Article
• Authors: Mi, Youquan; Zhang, Wei; Deng, Hui; Wang, Xunying; Fan, Liangdong; Zhu, Bin
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 34(2017)
• Page Start: 22214
• Page End: 22221
• Publication Date: 2017-08-24
• Subjects: Low temperature solid oxide fuel cells -- Electrolyte-free fuel cell -- Rare-earth materials -- Ionic-semiconductor composites -- Engineering cell; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.03.025
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Recent development on electrolyte-free fuel cell (EFFC) holding the same function with the traditional solid oxide fuel cell (SOFC) but with a much simpler structure has drawn increasing attention. Herein, we report a composite of industrial grade rare-earth precursor for agriculture and Li0.3 Ni0.9 Cu0.07 Sr0.03 O2-δ (RE–LNCS) for EFFCs. Both structural and electrical properties are investigated on the composite. It reveals that the RE–LNCS possesses a comparable ionic and an electronic conductivities, 0.11 S cm −1 and 0.20 S cm −1 at 550 °C, respectively. An excellent power output of 1180 mW cm −2 has been achieved at 550 °C, which is much better than that of the conventional anode/electrolyte/cathode based SOFCs, only around 360 mW cm −2 by using ionic conducting rare-earth material as the electrolyte. Engineering large size cells with active area of 25 cm 2 prepared by tape-casting and hot-pressing gave a power output up to 12 W. This work develops a new functional single layer composite material for EFFCs and further explores the device functions. Highlights: Industrial grade rare earth materials were used as ionic conductors. EFFCs were fabricated in both lab-scale and large engineering cells. The button type cell reached a peak power density over 1000 mW cm −2 at 550 °C. The single engineering cell with active area of 25 cm 2 reached 12 W.